This question runs in a pre-configured Salesforce environment - no personal connection required.
Find all accounts that have zero associated contacts. Return a list of account names sorted alphabetically. This tests understanding of relationship queries and subqueries in SOQL.
Examples:
Scenario: Org has accounts named 'Acme Corp', 'Beta LLC', 'Gamma Inc'
'Acme Corp' has 2 contacts, 'Beta LLC' has 0 contacts, 'Gamma Inc' has 0 contacts
Output: ['Beta LLC', 'Gamma Inc']
Explanation: Only accounts with no contacts are returned, sorted alphabetically.
Scenario: All accounts have at least one contact
Output: []
Explanation: An empty list is returned when no accounts lack contacts.
Scenario: No accounts exist in the org
Output: []
Explanation: An empty list is returned when there are no accounts.
Apex Code Editor
Welcome to Lightning Challenge!
Create an Account
Sign up to track your progress, earn points, and compete with others. Your solutions will be saved automatically.
Create accountHow It Works
- • Write your solution in the code editor
- • Connect your Salesforce org to test
- • Submit to check if your solution passes
- • Use hints if you get stuck
Contest Alert
🏆 #CodeEveryDay May 2026
Contest runs May 1 - 31. Complete challenges to climb the leaderboard!
Only the 31 daily challenges shown during this contest count toward points. Earlier dailies don't carry over.